/* insert into set of spills if not already there */
spill.spill = node;
- res = set_find(env->spills, &spill, sizeof(spill), hash);
+ res = set_find(env->spills, &spill, sizeof(spill), hash);
if(res == NULL) {
spill.spillslot = set_count(env->spills);
- spill.mode = mode;
+ spill.mode = mode;
spill.alignment = align;
- res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
} else {
assert(res->mode == mode);
assert(res->alignment == align);
}
spill.spillslot = set_count(env->spills);
- spill.mode = mode;
+ spill.mode = mode;
spill.alignment = align;
- res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
// collect attached spills and mem-phis
arity = get_irn_arity(node);
}
// add an affinity edge
- affinty_edge = obstack_alloc(&env->obst, sizeof(affinty_edge[0]));
+ affinty_edge = obstack_alloc(&env->obst, sizeof(affinty_edge[0]));
affinty_edge->affinity = get_block_execfreq(exec_freq, get_nodes_block(arg));
- affinty_edge->slot1 = res->spillslot;
- affinty_edge->slot2 = arg_spill->spillslot;
+ affinty_edge->slot1 = res->spillslot;
+ affinty_edge->slot2 = arg_spill->spillslot;
ARR_APP1(affinity_edge_t*, env->affinity_edges, affinty_edge);
}
return res;
}
+static int my_values_interfere2(be_irg_t *birg, const ir_node *a,
+ const ir_node *b)
+{
+ be_lv_t *lv = be_get_birg_liveness(birg);
+
+ int a2b = _value_dominates(a, b);
+ int b2a = _value_dominates(b, a);
+
+ /* If there is no dominance relation, they do not interfere. */
+ if((a2b | b2a) > 0) {
+ const ir_edge_t *edge;
+ ir_node *bb;
+
+ /*
+ * Adjust a and b so, that a dominates b if
+ * a dominates b or vice versa.
+ */
+ if(b2a) {
+ const ir_node *t = a;
+ a = b;
+ b = t;
+ }
+
+ bb = get_nodes_block(b);
+
+ /*
+ * If a is live end in b's block it is
+ * live at b's definition (a dominates b)
+ */
+ if(be_is_live_end(lv, bb, a))
+ return 1;
+
+ /*
+ * Look at all usages of a.
+ * If there's one usage of a in the block of b, then
+ * we check, if this use is dominated by b, if that's true
+ * a and b interfere. Note that b must strictly dominate the user,
+ * since if b is the last user of in the block, b and a do not
+ * interfere.
+ * Uses of a not in b's block can be disobeyed, because the
+ * check for a being live at the end of b's block is already
+ * performed.
+ */
+ foreach_out_edge(a, edge) {
+ const ir_node *user = get_edge_src_irn(edge);
+ if(is_Sync(user)) {
+ const ir_edge_t *edge2;
+ foreach_out_edge(user, edge2) {
+ const ir_node *user2 = get_edge_src_irn(edge2);
+ assert(!is_Sync(user2));
+ if(get_nodes_block(user2) == bb && !is_Phi(user2) &&
+ _value_strictly_dominates(b, user2))
+ return 1;
+ }
+ } else {
+ if(get_nodes_block(user) == bb && !is_Phi(user) &&
+ _value_strictly_dominates(b, user))
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * same as values_interfere but with special handling for Syncs
+ */
+static int my_values_interfere(be_irg_t *birg, ir_node *a, ir_node *b)
+{
+ if(is_Sync(a)) {
+ int i, arity = get_irn_arity(a);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(a, i);
+ if(my_values_interfere(birg, in, b))
+ return 1;
+ }
+ return 0;
+ } else if(is_Sync(b)) {
+ int i, arity = get_irn_arity(b);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(b, i);
+ /* a is not a sync, so no need for my_values_interfere */
+ if(my_values_interfere2(birg, a, in))
+ return 1;
+ }
+ return 0;
+ }
+
+ return my_values_interfere2(birg, a, b);
+}
+
/**
* A greedy coalescing algorithm for spillslots:
* 1. Sort the list of affinity edges
if (is_NoMem(spill2))
continue;
- if (values_interfere(env->birg, spill1, spill2)) {
+ if (my_values_interfere(env->birg, spill1, spill2)) {
DBG((dbg, DBG_INTERFERENCES, "Slot %d and %d interfere\n", i, i2));
bitset_set(interferences[i], i2);
bitset_set(interferences[i2], i);
}
}
+
+static void assign_spill_entity(const arch_env_t *arch_env, ir_node *node, ir_entity *entity)
+{
+ if(is_NoMem(node))
+ return;
+ if(is_Sync(node)) {
+ int i, arity;
+
+ arity = get_irn_arity(node);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(node, i);
+ assert(!is_Phi(in));
+
+ assign_spill_entity(arch_env, in, entity);
+ }
+ return;
+ }
+
+ assert(arch_get_frame_entity(arch_env, node) == NULL);
+ arch_set_frame_entity(arch_env, node, entity);
+}
+
/**
* Create stack entities for the spillslots and assign them to the spill and
* reload nodes.
}
}
} else {
- if(!is_NoMem(node))
- arch_set_frame_entity(arch_env, node, slot->entity);
+ assign_spill_entity(arch_env, node, slot->entity);
}
}
projects / libfirm / blobdiff